imageresolution

Descrição

imageresolution() allows to set and get the resolution of
an image in DPI (dots per inch). If none of the optional parameters is given,
the current resolution is returned as indexed array. If only
res_x is given, the horizontal and vertical resolution
are set to this value. If both optional parameters are given, the horizontal
and vertical resolution are set to these values, respectively.

The resolution is only used as meta information when images are read from and
written to formats supporting this kind of information (curently PNG and
JPEG). It does not affect any drawing operations. The default resolution
for new images is 96 DPI.

Parâmetros

Valor Retornado

When used as getter (first signature), it returns
TRUE on success, ou FALSE em caso de falha.
When used as setter (second signature),
it returns an indexed array of the horizontal and vertical resolution on
success, ou FALSE em caso de falha.